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## org.bouncycastle.crypto.engines
Class GiftCofbEngine

    java.lang.Object
      org.bouncycastle.crypto.engines.AEADBaseEngine
          org.bouncycastle.crypto.engines.GiftCofbEngine

All Implemented Interfaces:
  AEADCipher

public class GiftCofbEngine
extends org.bouncycastle.crypto.engines.AEADBaseEngine

GIFT-COFB v1.1, based on the current round 3 submission, https://www.isical.ac.in/~lightweight/COFB/ Reference C implementation: https://csrc.nist.gov/CSRC/media/Projects/lightweight-cryptography/documents/finalist-round/updated-submissions/elephant.zip Specification: https://csrc.nist.gov/CSRC/media/Projects/lightweight-cryptography/documents/finalist-round/updated-spec-doc/gift-cofb-spec-final.pdf

Nested Class Summary
`protected static interface` | `AEADBaseEngine.AADOperator`
`protected static class` | `AEADBaseEngine.AADOperatorType`
`protected static class` | `AEADBaseEngine.DataLimitCounter`
`protected static interface` | `AEADBaseEngine.DataOperator`
`protected static class` | `AEADBaseEngine.DataOperatorType`
`protected static class` | `AEADBaseEngine.DecryptionFailureCounter`
`protected static class` | `AEADBaseEngine.ErasableOutputStream`
`protected static class` | `AEADBaseEngine.ProcessingBufferType`
`protected static class` | `AEADBaseEngine.State`
`protected static class` | `AEADBaseEngine.StreamAADOperator`

Field Summary
`protected int` | `AADBufferSize`
`protected AEADBaseEngine.AADOperator` | `aadOperator`
`protected java.lang.String` | `algorithmName`
`protected int` | `BlockSize`
`protected AEADBaseEngine.DataLimitCounter` | `dataLimitCounter`
`protected AEADBaseEngine.DataOperator` | `dataOperator`
`protected AEADBaseEngine.DecryptionFailureCounter` | `decryptionFailureCounter`
`protected boolean` | `forEncryption`
`protected byte[]` | `initialAssociatedText`
`protected int` | `IV_SIZE`
`protected int` | `KEY_SIZE`
`protected byte[]` | `m_aad`
`protected int` | `m_aadPos`
`protected byte[]` | `m_buf`
`protected int` | `m_bufferSizeDecrypt`
`protected int` | `m_bufPos`
`protected AEADBaseEngine.State` | `m_state`
`protected byte[]` | `mac`
`protected int` | `MAC_SIZE`
`protected int` | `macSizeLowerBound`
`protected org.bouncycastle.crypto.engines.AEADBaseEngine.AADProcessingBuffer` | `processor`

Constructor Summary
`GiftCofbEngine()`

Method Summary
`protected void` | `checkAAD()`
`protected boolean` | `checkData(boolean isDoFinal)`
`int` | `doFinal(byte[] output, int outOff)` Finish the operation either appending or verifying the MAC at the end of the data.
`protected void` | `ensureInitialized()`
`protected void` | `ensureSufficientInputBuffer(byte[] input, int inOff, int len)`
`protected void` | `ensureSufficientOutputBuffer(byte[] output, int outOff, int len)`
`protected void` | `finishAAD(AEADBaseEngine.State nextState, boolean isDoFinal)`
`protected void` | `finishAAD1(AEADBaseEngine.State nextState)`
`protected void` | `finishAAD2(AEADBaseEngine.State nextState)`
`protected void` | `finishAAD3(AEADBaseEngine.State nextState, boolean isDoFinal)`
`java.lang.String` | `getAlgorithmName()` Return the name of the algorithm.
`int` | `getBlockSize()`
`int` | `getIVBytesSize()`
`int` | `getKeyBytesSize()`
`byte[]` | `getMac()` Return the value of the MAC associated with the last stream processed.
`int` | `getOutputSize(int len)` return the size of the output buffer required for a processBytes plus a doFinal with an input of len bytes.
`protected int` | `getTotalBytesForUpdate(int len)`
`int` | `getUpdateOutputSize(int len)` return the size of the output buffer required for a processBytes an input of len bytes.
`void` | `init(boolean forEncryption, CipherParameters params)` initialise the underlying cipher.
`protected void` | `init(byte[] key, byte[] iv)`
`void` | `processAADByte(byte input)` Add a single byte to the associated data check.
`void` | `processAADBytes(byte[] input, int inOff, int len)` Add a sequence of bytes to the associated data check.
`protected void` | `processBufferAAD(byte[] in, int inOff)`
`protected void` | `processBufferDecrypt(byte[] inputM, int inOff, byte[] output, int outOff)`
`protected void` | `processBufferEncrypt(byte[] inputM, int inOff, byte[] output, int outOff)`
`int` | `processByte(byte in, byte[] out, int outOff)` encrypt/decrypt a single byte.
`int` | `processBytes(byte[] input, int inOff, int len, byte[] output, int outOff)` process a block of bytes from in putting the result into out.
`protected int` | `processEncDecByte(byte[] output, int outOff)`
`protected int` | `processEncDecBytes(byte[] input, int inOff, int len, byte[] output, int outOff)`
`protected void` | `processFinalAAD()`
`protected void` | `processFinalBlock(byte[] output, int outOff)`
`void` | `reset()` Reset the cipher.
`protected void` | `reset(boolean clearMac)`
`protected void` | `setInnerMembers(AEADBaseEngine.ProcessingBufferType type, AEADBaseEngine.AADOperatorType aadOperatorType, AEADBaseEngine.DataOperatorType dataOperatorType)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### forEncryption

    protected boolean forEncryption

### algorithmName

    protected java.lang.String algorithmName

### KEY_SIZE

    protected int KEY_SIZE

### IV_SIZE

    protected int IV_SIZE

### MAC_SIZE

    protected int MAC_SIZE

### macSizeLowerBound

    protected int macSizeLowerBound

### initialAssociatedText

    protected byte[] initialAssociatedText

### mac

    protected byte[] mac

### m_buf

    protected byte[] m_buf

### m_aad

    protected byte[] m_aad

### m_bufPos

    protected int m_bufPos

### m_aadPos

    protected int m_aadPos

### AADBufferSize

    protected int AADBufferSize

### BlockSize

    protected int BlockSize

### m_state

    protected AEADBaseEngine.State m_state

### m_bufferSizeDecrypt

    protected int m_bufferSizeDecrypt

### processor

    protected org.bouncycastle.crypto.engines.AEADBaseEngine.AADProcessingBuffer processor

### aadOperator

    protected AEADBaseEngine.AADOperator aadOperator

### dataOperator

    protected AEADBaseEngine.DataOperator dataOperator

### decryptionFailureCounter

    protected AEADBaseEngine.DecryptionFailureCounter decryptionFailureCounter

### dataLimitCounter

    protected AEADBaseEngine.DataLimitCounter dataLimitCounter

Constructor Detail

### GiftCofbEngine

    public GiftCofbEngine()

Method Detail

### processBufferAAD

    protected void processBufferAAD(byte[] in,
                                    int inOff)

### processFinalAAD

    protected void processFinalAAD()

### finishAAD

    protected void finishAAD(AEADBaseEngine.State nextState,
                             boolean isDoFinal)

### init

    protected void init(byte[] key,
                        byte[] iv)

### processFinalBlock

    protected void processFinalBlock(byte[] output,
                                     int outOff)

### processBufferEncrypt

    protected void processBufferEncrypt(byte[] inputM,
                                        int inOff,
                                        byte[] output,
                                        int outOff)

### processBufferDecrypt

    protected void processBufferDecrypt(byte[] inputM,
                                        int inOff,
                                        byte[] output,
                                        int outOff)

### reset

    protected void reset(boolean clearMac)

### getAlgorithmName

    public java.lang.String getAlgorithmName()

  Description copied from interface: `AEADCipher`
  Return the name of the algorithm.

  Specified by:
    `getAlgorithmName` in interface `AEADCipher`
  Returns:
    the algorithm name.

### getKeyBytesSize

    public int getKeyBytesSize()

### getIVBytesSize

    public int getIVBytesSize()

### getMac

    public byte[] getMac()

  Description copied from interface: `AEADCipher`
  Return the value of the MAC associated with the last stream processed.

  Specified by:
    `getMac` in interface `AEADCipher`
  Returns:
    MAC for plaintext data.

### init

    public void init(boolean forEncryption,
                     CipherParameters params)

  Description copied from interface: `AEADCipher`
  initialise the underlying cipher. Parameter can either be an AEADParameters or a ParametersWithIV object.

  Specified by:
    `init` in interface `AEADCipher`
  Parameters:
    `forEncryption` - true if we are setting up for encryption, false otherwise.
    `params` - the necessary parameters for the underlying cipher to be initialised.

### reset

    public void reset()

  Description copied from interface: `AEADCipher`
  Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).

  Specified by:
    `reset` in interface `AEADCipher`

### setInnerMembers

    protected void setInnerMembers(AEADBaseEngine.ProcessingBufferType type,
                                   AEADBaseEngine.AADOperatorType aadOperatorType,
                                   AEADBaseEngine.DataOperatorType dataOperatorType)

### processAADByte

    public void processAADByte(byte input)

  Description copied from interface: `AEADCipher`
  Add a single byte to the associated data check. If the implementation supports it, this will be an online operation and will not retain the associated data.

  Specified by:
    `processAADByte` in interface `AEADCipher`
  Parameters:
    `input` - the byte to be processed.

### processAADBytes

    public void processAADBytes(byte[] input,
                                int inOff,
                                int len)

  Description copied from interface: `AEADCipher`
  Add a sequence of bytes to the associated data check. If the implementation supports it, this will be an online operation and will not retain the associated data.

  Specified by:
    `processAADBytes` in interface `AEADCipher`
  Parameters:
    `input` - the input byte array.
    `inOff` - the offset into the in array where the data to be processed starts.
    `len` - the number of bytes to be processed.

### processByte

    public int processByte(byte in,
                           byte[] out,
                           int outOff)
                    throws DataLengthException

  Description copied from interface: `AEADCipher`
  encrypt/decrypt a single byte.

  Specified by:
    `processByte` in interface `AEADCipher`
  Parameters:
    `in` - the byte to be processed.
    `out` - the output buffer the processed byte goes into.
    `outOff` - the offset into the output byte array the processed data starts at.
  Returns:
    the number of bytes written to out.
  Throws:
    `DataLengthException` - if the output buffer is too small.

### processEncDecByte

    protected int processEncDecByte(byte[] output,
                                    int outOff)

### processBytes

    public int processBytes(byte[] input,
                            int inOff,
                            int len,
                            byte[] output,
                            int outOff)
                     throws DataLengthException

  Description copied from interface: `AEADCipher`
  process a block of bytes from in putting the result into out.

  Specified by:
    `processBytes` in interface `AEADCipher`
  Parameters:
    `input` - the input byte array.
    `inOff` - the offset into the in array where the data to be processed starts.
    `len` - the number of bytes to be processed.
    `output` - the output buffer the processed bytes go into.
    `outOff` - the offset into the output byte array the processed data starts at.
  Returns:
    the number of bytes written to out.
  Throws:
    `DataLengthException` - if the output buffer is too small.

### processEncDecBytes

    protected int processEncDecBytes(byte[] input,
                                     int inOff,
                                     int len,
                                     byte[] output,
                                     int outOff)

### doFinal

    public int doFinal(byte[] output,
                       int outOff)
                throws java.lang.IllegalStateException,
                       InvalidCipherTextException

  Description copied from interface: `AEADCipher`
  Finish the operation either appending or verifying the MAC at the end of the data.

  Specified by:
    `doFinal` in interface `AEADCipher`
  Parameters:
    `output` - space for any resulting output data.
    `outOff` - offset into out to start copying the data at.
  Returns:
    number of bytes written into out.
  Throws:
    `InvalidCipherTextException` - if the MAC fails to match.
    `java.lang.IllegalStateException` - if the cipher is in an inappropriate state.

### getBlockSize

    public final int getBlockSize()

### getUpdateOutputSize

    public int getUpdateOutputSize(int len)

  Description copied from interface: `AEADCipher`
  return the size of the output buffer required for a processBytes an input of len bytes.

  The returned size may be dependent on the initialisation of this cipher and may not be accurate once subsequent input data is processed - this method should be invoked immediately prior to input data being processed.

  Specified by:
    `getUpdateOutputSize` in interface `AEADCipher`
  Parameters:
    `len` - the length of the input.
  Returns:
    the space required to accommodate a call to processBytes with len bytes of input.

### getTotalBytesForUpdate

    protected int getTotalBytesForUpdate(int len)

### getOutputSize

    public int getOutputSize(int len)

  Description copied from interface: `AEADCipher`
  return the size of the output buffer required for a processBytes plus a doFinal with an input of len bytes.

  The returned size may be dependent on the initialisation of this cipher and may not be accurate once subsequent input data is processed - this method should be invoked immediately prior to a call to final processing of input data and a call to `AEADCipher.doFinal(byte[], int)`.

  Specified by:
    `getOutputSize` in interface `AEADCipher`
  Parameters:
    `len` - the length of the input.
  Returns:
    the space required to accommodate a call to processBytes and doFinal with len bytes of input.

### checkAAD

    protected void checkAAD()

### checkData

    protected boolean checkData(boolean isDoFinal)

### ensureSufficientOutputBuffer

    protected final void ensureSufficientOutputBuffer(byte[] output,
                                                      int outOff,
                                                      int len)

### ensureSufficientInputBuffer

    protected final void ensureSufficientInputBuffer(byte[] input,
                                                     int inOff,
                                                     int len)

### ensureInitialized

    protected final void ensureInitialized()

### finishAAD1

    protected void finishAAD1(AEADBaseEngine.State nextState)

### finishAAD2

    protected void finishAAD2(AEADBaseEngine.State nextState)

### finishAAD3

    protected void finishAAD3(AEADBaseEngine.State nextState,
                              boolean isDoFinal)

Overview | Package | Class | Tree | Deprecated | Index | Help
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